长链烷氧甲基冠醚的表面活性研究

用表面张力测定法研究了长链烷氧甲基取代三甘醇及长链烷氧甲基取代冠醚的表面活性．结果表明，当侧链碳原子数大于８的双亲分子，在水溶液中一般均可形成胶束，而且随着碳原子数的增加，双亲分子在水溶液中的临界胶束浓度（ＣＭＣ）值减小，且每增加两个碳原子，其ＣＭＣ值减小约１０倍．在每一温度下，同系物ＣＭＣ的对数值与疏水链碳原子数之间呈线性关系，求出了回归方程。探讨了ＮａＣｌ对上述两种化合物表面活性的影响．

Surface Active Properties of Long Chain Alkoxymethyl Substituted Crown Ethers

he surface active properties of aqueous solution of the long chain alkoxymethylcrown ethers and corresponding open chain compounds alkoxymethyl oligoethylene glycols,have been investigated by surface tension measurement. The results show that compounds 1and2,where the number of carbon atoms in the side chain(n)exceeds 8,can form micelles inaqueous solution , and their CMC values decrease with the increase of n. Correlation of thelog(CMC)values of a homologous series of surface active agents for the same temperatarewith n gives a satisfactory linear relationship with the correlation coeffecients generally beinggreater than 0. 99. The effects of NaCl on the surface properties of the long chainalkoxymethyl substituted oligoethylene glycols and corresponding crown ether compoundsalso have been investigated.